Mechanical stoker.



W. 'M. DUNCAN.

MECHANICAL STOKER.

APPLICATION FILED APR. 8, 1912.

1,031,254. Patented July 2,1912.

' Fig.1.

lnvanbo'm M Duncan bx v To all whom it may coiwern;

UNIT D; sirres PATENT OFFIGE.

. WILLIAM: 1!. Duncan, or ALTON, ILLINOIS.

mncrrnmcali' s'roiinn.

, Be it known that. I,-WILLIAM honour, a'citiz en of the'United Statesjof America,

' andlresidentgof 'Alton, in the ,county of Madison and State of Illinois,.I'ha-ve.111- vented certain new and useful Improve Y 'nients in -.Mechanical- Stoker's, of which the following is a full, clear, and exact descrip- "ti-on, reference being had to the accompany; ing drawings, forming a partofthls speci fi'cation. l v Z I My invention relates t -.mechanic al-s tok-' ers', and ithas for its ob ect toso mount a -mechani'cal' stoker within, the combustion chamber ofafurnace as tolprovide for the.

stoker being adjusted to a position that will prevent discharge of the, residue from the fuel on the grate over- 'the' tail end, of the stokle'r, and thereafter to'a -position permitting such discharge. a By so mountin'ga stoker, I afford opportunity "for the thorough' consumption of the fuel, supported .by the travelingstoker grate, as distinguished from theincomplete combustion liable to occur where there is continued discharge of :residue over the tail end of the 'stoker, and much unburned .fuel is carried over with the -.res1due.

Figure I is in part-air elevation and in part a vertlcal SGCtIOII of my Stoker and a portion of the furnace 1n whlch it is shown mounted Fig. 11 is in part an elevation and inparta vertical section of means for tilting the stoker.

' In the drawings :-A

designates a 'portion -ofa furnace at the location of its combustion. chamber, and which includes atthe rear end of the combustion chamber an over- My improvement, g nera'lly considered,

consists'in the provision of means whereby thestolcer G is tiltably supported to permitgt of the rear end of the stoker being elevated;

'toa position that provides for the fuel and residue carrying portion of the stokergrate -Specification of mmirmaa Application-filed April 8, 1912. Serial No. mm.

being 1 "Patented July 2, 1912.

being placed inju'xtaposition to'a surmounting element, such .as that which will temporarily restrain the ashes' or other residue of combustion of fuel on-the grate; I

'In the preferred form of my improvement, 'thesto'ker C is mounted upon a support or supports'which'may comprises]. pair of rails 3, tilt-ablymounted intermediate of their ends onfpivot devices 4 which may be of knife-edge, or other suitable form. The platform preferably comprises the rails 3, in orderthat the stokei' may be moved therea on into andput of the furnace in which it is used, -in.-wh1c'h instance the st'oker is shifted as a carriage whlch travels upon the rails,

' furnished with track. wheels 5, resting on said rails, 1

Any suitable means for tilting the stoker support maybeprovided, but I refer to utiliz'e'themeans illustrated in the rawings,

. which comprises the followin parts: 6 des ignatesstandards located adjacent to the forward ends of the rails 3, and serving as supports for an operating shaft-7 which ocv cupies a horizontalpositlon infront ofthe stoker C. 1 The 'shaft7 has fixed to it bevel wheels 8 that mesh with bevel wheels 9 rest ing on ledge brackets 10 extending horizontallyfrom the standards 6. '11 are connecting rods pivoted to the rails3 and extending upwardly therefrom through the ledge brackets 10, the rods beingthreadedat'their upper ends I and located in' the bevel wheels 9, thereby providing m the vertical adjustoperating shaft'7i It will be apparent that when. the operating shaft is turned in one direction, the rails 3 will 'b'e tilted, 'c'ausin'g 4 95 7 their forward ends to. belowered, and their rear ends to be'elevated, whereas, when the shaft is rotated in the opposite direction,

there will be reverse tilting of said rails.

.As the front end-of. the Stoker. ismuch heavier than the rear end thereofythetrack" rails 3 are supported at their front ends the connecting rods 11, the bevel wheels 9 bemg forced ontothe ledges 10 by the Wei ht.

of thefront end of'the Stoker, The sha t- 7 and bevel wheels ,8 may beremoved from-the standards 6 to permitflthe removalpf the .stoker from the furnace.

' From the foregoing, it will be readily'um 'ment of the rods, due-to the operation of their scre'w threadedportions through said i wheels'when the wheels are'rotat'ed by'the iii;

3 "it ormer position to occasion the fhrniation .01 it until there is proximity to the nielnberB of the furnace,

andjmaintain it insu'ch position, whereby a bank of residue from burning fuel will be produced on the grate ill-,fI'Ollii of the element B; The bank of residuethus produced segues to retain the'fuel on'the grate infront combustion of the fuel as it is gradually fed toward the element B. Whenever the acieumu l-jation of residue becomes excessive, sueh residue may-be readily disqharged over the tail end of the stoker by tiltingQthe Stoker" to move its rear end downwardly" v 0 s1t10n seen 111 dottedlmes- Fig. l to -.the"pos1t1on seen in full l1nes,'and lmme from the diately after the excess of residue has heen' discharged the Stoker may be returned to nt it fresh hank of'residue that will serve the same; purpose as the previously existing bank.

The Stoker illustrated in the drawings may he readily held from longitudinal movemerit on its support by any suitable means, therneans shown comprising a pin 12 eX-1 tending through the Stoker frame and on gaging one of the traek whee-155.

I claim -1., The combination with a furnace, of, a: tiltable mechal'ncal stoker 1n the combustion chamber of said furnace a tiltable platform supporting said Stoker, the furnace being provided with anelement located above the rear end of the stoker, into proximity with, which the rear end of the Stoker may be:

tilted to provide for the restraint of the'load,

,furn=.icebeing provided with an abutment opportunity for complete for tilting said rails to elevate the rear nd on the stoker motion. 7

.2. The combination with a furnace, of a v. v Wheeled stoker in the combustion chamber 0t sand furnace, and tlltahle track rails sup-- porting said 'stoker whereby the rear end of the stoker maybe raised and lowered, said grate" ,WllllG'SHlCi grate, lsin.

50 3. The'combination Witha furnace, of a "wheeled stoker in I the eombus tioii chamber of saidfurnace, and tiltable supporting rails on which said Stoker rests, a barrier element at the rear end of the combustion chamber of the furnace above said Stoker; and means of the stoker'into proxiniity with the barrier element whereby the saidhar element may restrai the movement of fuel over thetail end of the Stoker,

4L The combination with'a furnace,- of awheeled stokerflin "the combustion chamber of said furnace, track railsnpon which the ivheels, of said stokerare mounted, means for 5 locking said wheel's, a pivotal support for 7 said trackrails, and means forrocking said track rails onsaid pivotal support-ysaid furnace being provided with a fuel retard ing abutment into proximity with which the rear end ofth'e stoker'inay be movedv WILLIAM M. DUNCAN. 

